Logic Block Diagram
A
0
B
0
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21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
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PI74FCT521T
8-BIT IDENTITY COMPARATOR
PI74FCT521T
Product Features:
• PI74FCT521T is pin compatible with bipolar FAST™ Series at
a higher speed and lower power consumption
• TTL input and output levels
• Extremely low static power
• Hysteresis on all inputs
• Industrial operating temperature range: –40°C to +85°C
• Packages available:
– 20-pin 173 mil wide plastic TSSOP (L)
– 20-pin 300 mil wide plastic DIP (P)
– 20-pin 150 mil wide plastic QSOP (Q)
– 20-pin 150 mil wide plastic TQSOP (R)
– 20-pin 300 mil wide plastic SOIC (S)
Fast CMOS
8-Bit Identity Comparator
Product Description:
Pericom Semiconductor’s PI74FCT series of logic circuits are pro-
duced in the Company’s advanced 0.8 micron CMOS technology,
achieving industry leading speed grades.
The PI74FCT521T is an 8-bit identity comparator. When two
words of up to eight bits are compared, a bit-for-bit match of the two
words provides a LOW output. The comparison can be extended
over multiple words by the expansion input. The expansion input
I
A
=
B
also serves as an active LOW enable input.
A
1
B
1
A
2
B
2
A
3
B
3
O
A=B
A
4
B
4
A
5
B
5
A
6
B
6
A
7
B
7
I
A=B
1
PS2019A 03/11/96
PERICOM [ PERICOM SEMICONDUCTOR CORPORATION ]
